Riverside Ponds & Headworks Mitigation Project

Project Description/ Scope of Work: The purpose of this project is to improve the resilience of critical WWTP infrastructure from catastrophic failure from flooding and associated erosion that threatens the City's WWTP. Work includes replacing the existing Riverside Ponds with new ponds with berms elevated above the 100-year floodplain, stabilization of the banks of the Oat Hill Mine Ditch and Napa River, realignment and stabilization of Simmons Creek, and other incidental improvements as shown on the project plans.


Bidding Closed

Prebid Date12/6/23 10:00am

Bid Date1/10/24 2:00pm

Company & Contacts

City of Calistoga
David Fradelizio  


Calistoga, CA

The Engineer's Estimate for the base bid is $3,600,000

The City will conduct a non-mandatory pre-bid meeting on December 6, 2023 at 10:00 A.M. The meeting will take place at the Dunaweal Wastewater Treatment Plant, 1100 Dunaweal Lane, Calistoga, CA 94515. The City encourages all prospective bidders and subcontractors to attend. Bidders who do not attend the pre-bid meeting will be responsible for their bids, and all provisions thereof, to the same extent as those bidders that did attend. Those bidders who do not attend the pre-bid meeting will not be excused from their bid or any provision thereof on account of information that was available at the pre-bid meeting.